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J. J. HOGAN. SEOT-IONAL BOILER. No. 425,426. Patented Apr. 15, 1890.

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. J. J. HOGAN.

SECTION AL BOILER.

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5 sheets sheet a.

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J. J. HOGAN. SEGTIONAL BOILER.

(No Model.) 5 SheetsSheet 4.

, J. J. HOGAN.

SEOTIONAL BOILER.

Patezited Apr. 15, 1890.

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No. 425,426. Patented Apr. 15, 1890."

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JOHN J. HOGAN, OF BROOKLYN, ASSIGN TO THE HOGAN ENGINEERING COMPANY, OF NEW YORK, N. Y.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent'N'o. 425,426, dated April 15, 1890.

Application filed July 1, 1889. Serial No. 316,150. (No model.)

To all whom it may concern:

Be it known that 1, JOHN J. HOGAN, a citizen of the United States, residing in the city of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in. Sectional Boilers, fully described and represented in the following specification and the accompanyin g drawings, forming a part of the same.

My present invention relates to cast-iron boilers formed in horizontal sections or disks with intermediate smoke-chambers and vertical passages through the sections for the passage of the smoke from one chamber to another, and is a modification of that secured to me in my patent application, Serial No. 292,68, filed December 4, 1888, and allowed January 12, 1889.

In my aforesaid application I have claimed the combination of a series of flat hollow sections united by central thimbles and by several series of outer thimbles arranged over one another to form continuous water-channels near the periphery of the sections; and in my present construction I employ the t-himbles at the center and the periphery of the sections, but construct the center thimbles integral with the sections and arrange the outer thimbles in a space outside the smoke-chamber to facilitate access thereto for constructing and repairing the joints.

To form the central chambers integral with the sections, I provide the opposed sides of the sections with cast-iron nozzles adapted, when pressed together, to form a tight joint and an uninterrupted vertical channel in the center of the boiler, and I utilize the outer thimbles to draw the sections firmly together and produce the desired joint between the said nozzles. I also dome the upper sides of the water-sections to facilitate the movement of the water when heated toward the central thimblesand the lower side of the, section over the fire-pot may also be domed for the same reason. By placing the outer thimbles outside the smoke-chamber I maintain them at a much lower temperature than with my former construction, and thus induce a more rapid downward movement through the same, which greatly promotes the upward movement through the central thimble, and thus maintains the most active circulation Within the boiler.

I11 addition to the horizontal boiler-sections perforated to permit the passage of the smoke to and through the intermediate smoke-chamhers I provide a water ring or jacket partly around the fire-box, and connect the same with the superposed section by thimbles to secure the desired circulation.

My invention will be understood by reference to the annexed drawings, in Wl1lGh- Figure 1 is a front View of the apparatus. Fig. 2 is a plan of the fire-box Without the fire-brick and with the superposed boilersections removed. Fig. 3 is a plan of the WllOlQ structure, and Fig. at a vertical section of the same on line no a: in Fig. 3. Fig. 5 is a vertical section at right angles to the latter on line y y in Figs. 3 and 6. Fig.6 is a plan Fig. '7 is a plan of the fire-box Fig. 8 is a plan of the second perforated section above the water-jacket; Fig. 9, a plan of the third perforated section above the water-jacket. Fig. 10 is a portion of the first and second sections above the water-jacket, in section, like Fig. 5, upon a larger scale, to show the construction of the outer thimble. Fig. 11 is a Vertical section of the same parts on line a z in Fig. 10; and Fig. 12 is a horizontal section, upon a still larger scale, upon line .2 z in Fig. 10.

A is the ash-box.

B is the fuel orfire box, lined with fire-brick.

O O is the grate.

D is the water-jacket, set upon the fuelchamber to form the upper portion of the firebox, the water-jacket being provided with three pockets D, D and D, with upward openings to receive thimbles t. The waterjacket is also provided with inlet I to receive the water from the return-pipes of the circulation system.

E is the first section above the water-jacket, provided with pockets E, E and E correspondin g with those upon the water-j acket,the pocket E being open toward the water-jacket of the first perforated section above the water-j acket. wvith the superposed section containing the water-jacket and the fuel-door.

, only. The section E forms the dome to the and 9.

His the top section, not perforated to permit the passage of the smoke, but operating as a delivery-chamber. This section is provided with outer pockets having openings upon their under sides only, and with central nozzles on its upper and under sides. The pockets for the outer thimbles are arranged upon the'opposite sides or edges of the several sections to furnish an equal current of water upon opposite sides of the boiler, and radial water-channels w are formed inside the sev-' eral sections between the pockets and the central nozzles to arrest circulation, as shown by the arrows in Figs. 5, 6, 8, and 9. The pockets D and E upon the water-jacket D are similarly arranged to connect therewith, and the jacket is shown extended only part way around the fire-box, so as not to interfere with the fuel-door I. The water-inlet I is arranged midway of the nozzles D and D and as the water-jacket has no central communication to promote circulation with the sections above the third nozzle D is provided above such inlet to permit a circulation in one direction from the sections above, while the pockets D and D permit a circulation of the heated fluid upward in the opposite direction. The section plane in Fig. 4:, which is taken parallel with the flat smoke-passages s transverse to a line drawn through the outer thimbles, intersects the water-channels in the boiler-section E and the inlet I- upon the water-jacket, as well as the thimble t, connecting the thimble D with the pocket E It also intersects the boiler-section G in its central water-channel;but as the smoke-spaces are alternated in the several sections the section of'the-figure passes through one of the smoke-passages s in the boiler-section F, the water-space being shown only at the central thimble and in the annular cavity lettered F in Figs. 4 and 8 at the outer end of the middle smoke-passage s.

The central thim bles are shown formed each bymeans of a circular seat N, formed upon one side of the boiler-section, and a circular nozzle N, formed upon the side of the adjacent section,the opposed faces being fitted'to form a tight joint either with or Without an interposed packing. The nozzle and seat serve to hold the sections apart sufiiciently to form smoke-chambers J, the lower one of which receives the gases from the fire-box through the passages s in the section E, and the upper one discharging the smoke laterally by a nozzel J, constructed to fit a stove-pipe. The

smoke-chambers between the several sections are formed by means of flanges a, projected from the peripheries of the sections toward one another and curved inwardly at a, (Figs. 6 to 9, inclusive) to throw the several pockets and their connecting-thimbles outside of the smoke-chamber. The smoke-inclosing flange may be projected partly from the opposed sides of the boiler-sections, as in Figs. t and 5, and at a upon the upper and lower sides of Fig. 10, or the, flange may be projected whollyfrom one of theboiler-sections, as shown at a in Fig. 10. An annular tongue'e is preferably formed upon the flange a or the adjacent section to close, the joint and prevent leakage of the gases.

In Fig. 10 a part of the sections E and F are shown, and the under side of the section E, which forms the top ofthe fire-box, is shown slanted toward the center to form a conical dome, which form may be used in preference to that shown in Figs. land 5 to assist the circulation of the fluid from the outer thimbles toward the central nozzle. The adjacent faces of the pocket are preparedvto receive the connecting-thimbles by forming in one a screw-thread cl and in the other a conical seat n. The pockets of the respective sections are by means of the intermediate smoke-space separated suificiently to apply lock-n uts 1 (see Fig. 10) to the thimble between the pockets which it connects. The thimbles, as shown in Figs. 10, 11, and 12, are provided each with a groove 0 near one end to receive an externally-tapered split ring m, adapted to fit the conical seat .72.. A split m, formed in the, packing-ring 'm, permits its removal from the thimble until the end of the latter is pushed through the conical seat, when' the end is slipped over the end of the thimble into the groove, and forms a collar upon the thimble to prevent its retraction. By jamming the lock-nuts together upon the center of the thimble they may then be used to -screw.the thimble into the threaded hole dupon the adjacent pocket, and the sections are thus drawn as closely together as the contact of the central nozzles N will permit.

The flanges around the smoke-chambers are arranged with clearance between their opposite edges, and as the nozzles are arranged upon opposite sides of such centralthimble and the entire stress of the screw-thimbles is thrown upon such central nozzles the joints of the latter are made very secure and rigid. Annular ribs 6 are preferably formed to cover the joint of thesmoke-flanges a, or a to prevent leakage outward.

lVhen the thiinbles t have been properly screwed to their seats, the lock-nuts are separated and may be used to make a tightjoint around the thimble at the faces'of the oppo- ITO site pockets by screwing the locking-nuts against such faces, as shown in Figs. 10 and 11, any suitable packing being inserted beneath the nuts, as maybe required. As the pockets are projected from the peripheries of the sections, as plainly shown in Figs. 6 to 9, inclusive, and are wholly outside of the intermediate smoke-chambers, it is obvious that the lock-nuts are fully exposed for the application of a wrench, and that any of the thimbles t may thus be independently adjusted or their joints repacked in case of leakage at any time.

To cover the thi mbles, and thus protect them from needless interference, as well as to give a finished appearance to the structure, I provide guards or caps f, shaped to cover the V cavity between the adjacent pockets and provided with feet f secured to the adjacent sections by screws g. The annular ribs 6, as well as the caps f, are clearly shown in Fig. 1, in which doors h are also exhibited to give access to the smoke-spaces. These doors are also shown in Fig. t at the right-hand side, and render the spaces between the water-sections completely accessible for cleaning or examination. I

A piped is shown projected from the center nozzle upon the top section H, and in operation the heating-radiators would be connected with such pipe, while the cold water returned from such radiators would be admitted to the water-jacket D at the bottom of the boiler by the inlet I or to the lower section.

By the use of the compression-joints formed by the nozzles N N at the center of the boiler I greatly facilitate the manufacture and con-' nectin g of the several sections, while the location of the connecting-thimbles wholly outside of the smoke-chambers greatly facilitates the connection of the parts together and the maintc ining of the joints in a tight condition. The slanting or domed upper surface of each section also assists a circulation of the fluid toward the center of each section, and thus determines an upward flow through the central nozzles, while any supply of fluid that is required in the lower .part of the boiler and is not furnished by the cold-water supply to the inlet I is freely. and fully supplied by the outward thimble t. The boiler is thus particularly adapted for operation in situations where the draftor demand upon the boiler for hot water is irregular, as the cutting off of the entire external system of circulation would not cause the formation of steam in the boiler or the overheating of the parts around the fire-box, as the arrangement of the central and outer thimbles is such as to promote a rapid vertical movement at the center of the boiler and a corresponding downward movement at its periphery, which would tend to keep all parts of the. boiler at a nearly-equal temperature.

The provision of three thimbles to connect with the water-jacket also permits a return circulation at the inlet I, where the coldest fluid exists, and an upward circulation at the thimbles D and D to supply the boiler-sections above, while the extension of the jacket from one pocket D to the other pocket D upon each side of the boiler nearer the door I, terminating at two of the pockets, whose thimbles would furnish the desired circulation throughout the whole jacket.

The water-inlet I for the return-fluid might be formed in the lower boiler-section E and the water-jacket dispensed with, as it is not essential to the operation of the central and outer thimbles in effecting the desired circulation.

A boiler may be constructed with any number of sections to embody my improvement. The sloping bottom shown upon the top section II in Figs. 4 and 5 is of great value in throwing outward by its gravity the fluid which is forced upward in ebullition through the central thimbles into the upper section in excess of the demand upon the dischargepipe i. Such fluid in running downward upon the sloping bottom surface of the section H is directed positively toward the outer thimbles leading downward from such section into connection with the sections below it, and the circulation tl'irough the several sections is thereby assisted.

In aboiler of such construction used for generating steam the upper section II would be used as a steam-space, and it is obvious that any water driven up through the central thimble would run freely down the sloping bottom surface of such section andbe returned more promptly to the lower sections than by a section with flat bottom. lVhen the circulation in a hot-water boiler is defective, the rapid boiling of thewater is liable to carry the mingled hot and cold fluid together to the heating-radiators; but in my construction the free circulation between the upper and lower parts of the boiler and the provisionof the central thimble beneath the discharge-pipe i secures the discharge of only the hottest fluid from the boiler-mam ely, the

fluid thrown upward from the central part of each section directly over, the fire-box.

Having upon the same day with the present application filed another application, Serial No. 316,149, showing subject-matter similar to that contained herein, and having in the said application claimed a boiler with acentral water-passage extended vertically within the boiler for the upward movement of the fluid, in combination with one or more water-conduotors exterior to the water-space of the boiler and connected therewith at its upper and lower parts, irrespective of a sectional construction for the parts of the boiler, I hereby disclaim the said application and restrict my present invention to a cast-iron sectional boiler.

Having thus set forth the nature of my in- Vention, what I claim is 1. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of water-circulating passages through the margins of the sections and central nozzles formed upon the sections, and adapted when pressed together to form a tight joint and an uninterrupted vertical channel for the water inthe center of the boiler, substantially as herein set forth.

2. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of central nozzles and seats formed integral with the sections to form a central Water-channel and a series of thimbles connecting the margins of the sections, and adapted to draw the nozzles and seats into close contact with one another, substantially as herein set forth.

3. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of a flange inclosing the smoke-chamber within the margin of the section, central nozzles and seats integral with the sections to form a central water-channel,-

and a series of thimbles connecting the margins of the sections outside of the said flange, and adapted to draw the nozzles and seats into close contact with one another, as and for the purpose set forth.

4. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of a flange inclosing the smoke-chamber Within the margin of the section, central nozzles and seats integral with the sections to form a central water-channel, a series of threaded apertures in the sections outside the said flange, and a series of threaded thimbles fitted to such apertures, and adapted to draw the nozzles and seats into close contact with one another, as and for the purpose set forth.

5. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of a flange inclosing the smoke-chamber within the margin of the section, central nozzles and seats integral with the sections to form a central water-channel,

a series of threaded apertures in the sections outside the said flange, a series of threaded thimbles fitted to such apertures, thread upon the thimbles intermediate to the sections, andlock-nuts applied to such thread to rotate the thimbles and pack the joints, as and for the purpose set forth.

6. A'cast-iron sectional boiler consisting in the several sections, of central nozzles and seats formed integral with the sections to form a central water-channel, a series of pockets projected from the margins of the sections, and a series of thimbles connected with the said pockets and adapted to draw thenozzles and seats into close contact with one another, substantially as herein set forth.

. 8. In a cast-iron sectional boiler having two or more horizontal sections connected with intermediate combustion-chambers and having vertical gas or smoke passages extending through the sections, the combination, with the several sections, of central'nozzles and seats formed integral with the sections to form a central water-channel, a series of pockets projected from the margins of the sections, a flange inclosing the smoke-chambers within the said pockets, and a series of thimbles connected with the said pockets and adapted to draw the central nozzles and seats into close contact with one another, substantially as herein set forth.

9. In a cast-iron sectional boiler having two' or more horizontal sections connected with intermediate smoke-chambers and having vertical smoke-passages extending through the sections, the combination, with the sections, of central nozzles and seats formed integral IIS with the sections to form a central waterchannel, pockets upon the opposite sides of such sections for conn ecting-thimbles,a waterjacket beneath the said sections provided with a water-inlet and with three outer thimbles, as described,'and thimbles connecting the several sections at their opposite sides and connectin g the lowest section with the Waterjacket at three points, substantially as herein set forth.

10. A cast-iron sectional boiler consisting in In testimony whereof I have hereunto set my two or more horizontal sections having each hand in the presence of two subscribing Wita central Water-channel consisting in nozzles nesses. projected from one or both sides of the sec- 5 tions, and a series of thiinloles connecting the JOHN J. HOGAN.

margins of the sections and adapted to draw the sections together at the nozzles, and the WVitnesses: upper section having its bottom sloped clown- THOS. S. CRANE, ward from the central nozzle to the outer F. O. FISCHER. 1o thimbles, as and for the purpose set forth. 

